The engine is a motor produced by Altai Motor Plant OJSC. Diesel power units intended for installation on special equipment, as well as industrial tractors, bulldozers and other construction vehicles.
Specifications
Motors of class A01 have high technical characteristics and reliability. This power unit is not equipped with a turbocharger, but there is plenty of diesel power. This power unit replaced the famous SMD-7. The engine was developed back in the mid-60s according to the drawings of the Kharkov Hammer and Sickle plant.
At this moment, a modernized version of the A-01 MRSI-1 engine is being produced. It is used on Tractor -T-4A, TT-4, TT-4M, Motor grader DZ-122, DZ-143, DZ-180, Loaders TO-18, TO-28, Excavator EO-121, EO-4124, Road pavers DU-58, DU-62, as well as MTP-71A, MTP-7, LP-19A.
Excavator with motor A01
Main technical characteristics:
Naturally aspirated diesel engines of type A-01 are equipped with a 2-valve gas distribution mechanism. They are distinguished by their simplicity of design and reliability. Diesels comply with GOST R 41.96-2005 for emissions of harmful substances.
Loader with A01 engine
The diesel engines use liners made of special cast iron with the working surface treated by flat-top honing, pistons with a three-ring set of piston rings, an optimized side surface profile and a graphitized skirt, a crankcase with increased strength and improved cooling of the cylinder liners.
Improvements in the design of diesel engines made in recent years have made it possible to reduce oil consumption due to waste and increase engine life to 12,000 operating hours.
Also, upon customer request, the following options are available:
Motor series A01
- clutch;
- exhaust silencer;
- liquid-oil heat exchanger for cooling engine oil;
- generator with power from 800 W to 3000 W and voltage 12 or 24 V;
- belt driven pneumatic compressor;
- electric torch pre-heating of air;
- two hydraulic pumps type NSh-10 and NSh-32.
Maintenance and repair
Maintenance of the A01 motor is quite simple. We can say that it is similar to all diesel power units, such as YaMZ. Maintenance is carried out every 12-15 thousand kilometers. This indicator includes changing the engine oil and filter element. It is also recommended to check the ignition and the condition of the air filter. Do not forget that the air element is replaced every second maintenance.
The engine is not particularly demanding in the use of fuel and engine oil. So, for normal operation any more or less high-quality mineral lubricant is suitable. As practice shows, motorists usually pour oil such as M10 into the engine. It perfectly performs all the necessary functions, and also, if replaced in a timely manner, protects the engine elements well. It is recommended to pay special attention to the air filter. It is best to take a quality product with a metal base.
Conclusion
The A01 motor has become quite widespread in construction and agricultural vehicles. Thus, some car enthusiasts even installed the power unit on the ZIL 131. Inter-service maintenance is carried out quite simply, since the power unit has simple design features.
The cost of a major overhaul on the website is indicated taking into account spare parts, subject to the maintainability of the main engine elements: Cylinder head, crankshaft, cylinder block.
What does an engine overhaul include?
1. Replacement of the piston group (liner, piston, pin, rings);
2. Replacement of main and connecting rod bearings;
3. Repair of the crankshaft (grinding/polishing);
4. Repair of the cylinder head, adjustment of valve clearances, crimping and processing of the cylinder head plane;
5. Repair of fuel equipment (replacement of injection pump plunger pairs, replacement of injector nozzles). Checking and adjustment on the stand;
6. Replacement of all rubber goods, gaskets, bearings;
7. Repair of pneumatic compressor;
8. Turbocharger repair (if equipped);
9. Running in the engine on a stand in 3 modes (cold, hot at idle, hot under load);
10. Painting.
Engine swap!
Change your faulty engine to an overhauled engine in just 1 day!
You pay for the repair and pick up the repaired engine from our warehouse!
It is convenient and saves your time significantly!
Repair period
Regardless of the workload of production, we will repair your engine within a period not exceeding 10 days.
Guarantee
We provide a 6-month warranty on all overhauled engines from the date of receipt.
Delivery
If you are from another region, then this is not a problem! We will promptly send the engine by a transport company convenient for you or by passing transport to any region of the Russian Federation. At the same time, we will deliver the engine to the transport company’s terminal in Nizhny Novgorod free of charge, but you only pay for inter-terminal transportation to your city.
With liners (set of spare parts - plain bearings);
The crankshaft is designed to complete the A-41 diesel engine and modifications of engines based on it.
When buying a (new) crankshaft, ask for a certificate of conformity and check the manufacturer’s terminals, as well as the supplier’s terminals on the shaft housing. During transportation and storage, it is necessary to monitor the safety of the working surfaces of the crankshaft and protect them from thermal (do not overheat), mechanical ( do not hit, do not scratch), corrosion (do not wet) and other damage.
Crankshaft journals are available in nominal sizes. Repair of the A-41 crankshaft is carried out by highly qualified specialists with extensive experience using modern equipment. The nominal and repair dimensions of the shaft are indicated in Tables 1 and 2. The plant provides various combinations of connecting rod and main journals of the shaft. The manufacturer indicates the size group on the 7th journal of the shaft. If the crankshaft comes out of the factory with a 1m rating, there are no markings on the journals. The manufacturer balances the crankshaft in dynamic mode. In this case, the imbalance is no more than 160 g cm.
Table 1. Crankpins of the crankshaft
|
Marking of size groups |
Diameter of crankshaft journals, mm |
Liner thickness, mm |
||||
|
Size |
Tolerance |
Size |
Tolerance |
Size |
Tolerance |
|
|
0,127 |
0,038 |
|||||
Table 2. Crankshaft journals
|
Marking of size groups |
Diameter of crankshaft journals, mm |
Int. bearing diameter, mm |
Liner thickness, mm |
|||
|
Size |
Tolerance |
Size |
Tolerance |
Size |
Tolerance |
|
|
104,98 |
0,022 |
0,137
|
0,048
|
|||
|
104,73 |
104,75 |
5,625 |
||||
|
104,48 |
104,5 |
5,75 |
||||
|
104,23 |
104,25 |
5,875 |
||||
|
103,98 |
||||||
|
103,73 |
103,75 |
6,125 |
||||
1. Preparation for installing the crankshaft of the A-41 engine
1.1. Unpack the shaft: clean the grease, remove the plugs (oil pockets), get rid of any remaining preservation, wash the shaft (preferably under pressure), dry it by blowing with compressed air, install the plugs. The plugs are not allowed to protrude above the surface of the crankshaft.
Important! If, after re-preservation, you discover a discrepancy in the dimensions of the shaft journals, the location of the oil channels, or the absence of oil channels, corrosion on the journals and similar defects, then installing the crankshaft on the engine is strictly prohibited!!!
1.2. From the rear side, the oil deflector is pressed onto the shaft flange. The concave side of the flange is turned towards the flange collar. Lock the oil deflector by pressing the metal of the oil deflector into the recesses (four recesses) on the shaft. The gap between the ends of the oil deflector and the thrust end of the crankshaft is up to 1 mm.
2. Requirements for contacting parts
2.1. In order to increase service life and prevent premature failure of the crankshaft. In addition to making unfounded claims, it is necessary to ensure the suitability of the mating parts in the assembly. Parts rejected in accordance with GOSNITI technical conditions for defective parts of the A-41 engine cannot be installed.
2.2. The connecting rod and main bearing shells must correspond to the dimensions of the crankshaft journals (see tables 1 and 2).
Corresponding designation of a set of connecting rod and main bearings:
- A23.01-93-41SB (41-03s4-2) – connecting rod bearings;
- A23.01-116-41SB (4T6-04s9) – root inserts.
2.3. The diameter of the half rings is selected based on the diameter of the 5th molar neck.
2.4. Static imbalance of the crankshaft pulley is no more than 75 g cm.
2.5. Static unbalance of the flywheel assembly with oiler and screws is not more than 50 g cm.
2.6. The covers of the main bearings of the engine crankshaft must fit clearly into the seats of the block. The original position of the main bearing caps must not be changed.
2.7. No mismatch between the ends of the 5th main bearing cover and the ends of the engine crankcase support is allowed. The gap between the ends of the cover of the 1st main bearing and the support from the inside is up to 0.5 mm.
2.8. The mass deviation of connecting rods on one engine does not exceed 17 grams.
2.9. Changing the position of the paired lower connecting rod caps is not allowed.
2.10. The deviation in the mass of the pistons of one engine does not exceed 20 grams.
2.11. The deviation of the mass of the piston pins of one engine does not exceed 10 grams.
3. Requirements for assembling the A-41 engine
3.1. Clean the parts selected for engine assembly from preservation, dust, dirt, water and other undesirable coatings.
3.2. During installation, wipe the rubbing surfaces of parts such as the main and connecting rod journals of the crankshaft, bearings and thrust half-rings with a rag and lubricate them with diesel oil, and apply a layer of grease to the working surfaces of rubber goods (rubber for technical products).
3.3. It is necessary to align the oil holes in the liners with the oil guide channels of the engine. Also, align the locks of the liners with the grooves of the beds in the block.
3.4. The bearing mounting bolts are tightened starting from the third main bearing, with a tightening torque of 402-431 N m (41-44 kgf m).
3.5. After tightening the bolts of the main bearings of the crankshaft of the A-41 engine, the turning force in the bearings should not exceed 49 N m (5 kgf m). The (longitudinal) play of the crankshaft in the thrust bearing half rings does not exceed 0.093-0.380 mm. In main bearings the clearance does not exceed 0.116-0.180 mm.
3.6. The connecting rod bolts are tightened, starting with the long bolt, with a torque of 216-235 N m (22-24 kgf m).
3.7. The constriction of the connecting rod along the crankshaft journal is free from the “hand”. The play (longitudinal) of the lower head of the connecting rod fixed to the crankshaft journal is within 0.24-0.70 mm.
3.8. After tightening the connecting rod bearings, the crankshaft should rotate with a force of no more than 186 N m (20 kgf m).
4. Running in and testing of the A-41 engine
Attention! The engine must be put into operation only after preliminary running-in.
4.1. Running in is necessary to break in all rubbing surfaces.
4.2. Running in the A-41 engine is divided into stages:
- Stage 1 - running in at low speed for 1.5-2 hours;
- Stage 2 – running in at nominal speed on a running tractor for 60 hours.
4.3. Run-in is carried out in accordance with the factory's current technical documentation for the A-41 engine.
4.4. The break-in process is accompanied by listening to the engine, visually observing the operation of the engine, and if necessary, eliminating detected faults. After the break-in is completed, maintenance and oil changes are carried out in the engine.
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The A 41 four-cylinder diesel engine is manufactured by the Altai Motor Plant and is intended for installation on heavy construction equipment and agricultural vehicles.
Specifications
| OPTIONS | MEANING |
|---|---|
| Engine weight, kg | 930 |
| Dimensions (length/width), mm | 1425/827 |
| Cylinder block material | cast iron |
| Supply system | Direct injection |
| Engine operating order (counting from the fan side) | 1 - 3 - 4 - 2 |
| Cylinder displacement, l | 7.43 |
| Power, l. With. | 90 |
| Nominal speed, rpm. | 1750 |
| Number of cylinders | 4 |
| Cylinder arrangement | vertical |
| Piston stroke, mm | 140 |
| Cylinder diameter, mm | 130 |
| Compression ratio | 16 |
| Maximum torque at 1200 - 1300 rpm, Nm | 412 |
| Fuel | diesel |
| Minimum specific fuel consumption, kWh | 1.62 |
| Cooling system | Liquid, with forced circulation of coolant |
| Oil | In summer, diesel oil DS-11 (M12V) or M10V; in winter - DS-8 (M8V). |
| Generator | DC 214A1 or G304. |
| Hydraulic pumps | 2 gear type pumps NSh10DL and NSh46UL; driven by a gear transmission from the crankshaft. |
The engine is installed on tractors DT-75M, T-4A, T-4, excavators, rollers, motor graders, pumping units, power plants.
Description
The displacement of this four-cylinder diesel engine A 41 is 7.43 liters, which allows it to provide power of 90 horsepower at 1750 rpm. The A 41 engine has a direct injection system, which in the latest versions is fully electronically controlled.
A design feature of this power unit is a two-valve gas distribution mechanism, which ensures maximum efficiency and output. To increase the reliability of the design, the A 41 diesel engine used special liners made of cast iron with surface treatment using top honing technology.
The cooling system used can significantly reduce the operating temperature, which has a positive effect on the reliability of this power unit. An external liquid-oil heat exchanger is used to cool the oil, allowing the power unit to operate at maximum loads and under difficult operating conditions.
Modifications
Over the years that this engine has been on the assembly line, it has undergone minor changes that have significantly simplified equipment maintenance, improved its reliability, reduced fuel consumption and increased power.
For example, modification A-41SI-03 has an in-line arrangement of cylinders, which made it possible to increase the rated power from 90 to 100 horsepower. This power unit has a torque reserve coefficient of 20%, while for modifications A-41SI-1 and A-41SI-02 this figure is 15%.
Since 2001, in the manufacture of these power units, individual cylinder heads have been used for each group of cylinders, which in turn has increased the reliability of the gas joint seal and reduced oil consumption during combustion.
The engine, while on the assembly line, was improved, receiving various electronic control units. In 2003, this power unit began to be equipped with an electric starter, which increased its service life. In 2012, under license for the A 41 diesel engine, German crankcase blocks began to be installed, which increased the reliability of the engine.
A total of 11 different modifications were produced, most of which are a basic engine with additional attachments installed on it. So, for example, it is possible to install two hydraulic pumps, a belt pneumatic compressor, an additional generator, an enlarged liquid-oil heat exchanger designed for oil cooling, a modernized clutch and a number of other elements.
Maintenance
Servicing this power unit is not particularly difficult, which allows you to carry out such work yourself.
- In fact, when operating equipment with this type of engine, you only need to constantly monitor the oil pressure and temperature, be sure to check the current lubricant level, wash the oil filter and promptly change the oil every 240 engine hours.
- Shift maintenance is carried out daily, at the beginning or end of the shift, every 8-10 operating hours. At the same time, the engine is cleaned of dust and dirt, fasteners and connections are checked for tightness, whether there are any extraneous noises, fuel is added (if there is any leakage), oil and water.
The engine cooling system of modification A 41 is serviced on a regular basis. The system must be flushed to remove scale, and if there is a leak, the radiator is additionally sealed.
Malfunctions
| FAULT | CAUSE |
|---|---|
| The engine overheats, which makes it impossible to operate the equipment. | The cooling system of this power unit uses mainly water, which can lead to sedimentation or the appearance of calcium deposits on the radiator honeycombs. That is why, when the operating temperature increases, it is necessary to inspect the condition of the radiators, rinse them, removing the corresponding scale. In some cases, it is necessary to replace the thermostat or replace a broken pump. |
| Increased oil loss is noted. | The reason for this may be a valve cover that has lost its seal, which is installed separately on each group of cylinders. A similar problem was solved in the latest modifications of this engine, where German crankcase blocks were used. |
| The A 41 engine has lost most of its power and is running with noticeable vibration. | It is necessary to open the power units and check the condition of the pistons and crankshaft. Quite often balancing bearings fail and require appropriate replacement. |
| There are interruptions in engine operation and problems with starting are noted. | The cause of such a breakdown may be a clogged fuel filter or problems with the injection system. It is necessary to first inspect the condition of the fuel system, and then open the engine. |
Tuning
- Tuning this power unit involves installing a turbine from 440 series engines. Such a motor, provided that the connecting rods and lubrication system are replaced, is capable of producing about 145 horsepower without any reduction in engine life.
- It is possible to increase the power of the power unit by reprogramming the control unit and replacing the injection system. By carrying out such a modernization of the A 41 engine, you can get an additional 5-10 horsepower.
Section I. ENGINE CONSTRUCTION
Chapter 1. General information
Chapter 2. Main components and mechanisms of engines
Cylinder block
Cylinder head
crank mechanism
Gas distribution mechanism
Balancing mechanism
Features of assembly and disassembly of main components and mechanisms
Chapter 3. Cooling system
Water pump and fan
Features of assembly and disassembly of cooling system components
Chapter 4. Lubrication system
Oil pump
Oil filter
Features of assembly and disassembly of lubrication system components
Chapter 5. Power System
Fuel lift pump
Fuel pump
Speed regulator
Installing the fuel pump on the engine and its drive
Design and operation of the nozzle
Fuel pre-filter
Fine fuel filters
Fuel lines
Air purifier
Chapter 6. Starting system
Starting motor
Starting motor gearbox
Chapter 7. Electrical equipment
Generator
Starter
Chapter 8. Additional units and components
Clutch
Hydraulic pumps
Section II. ENGINE OPERATION
Chapter 9. Operating materials
Lubricants
Fuel
Coolant
Chapter 10. Engine Operation
Safety regulations
Preparing the engine for starting
Starting, running and stopping the engine
Running in the engine
Features of engine operation in the autumn-winter period
Storage, preservation and depreservation of the engine
Chapter 11. Maintenance
Shift maintenance
Maintenance No. 1
Maintenance No. 2
Maintenance No. 3
Seasonal maintenance
Engine lubrication chart
Chapter 12. Engine adjustment
Checking and adjusting the fuel supply advance angle
Adjusting the fuel pump
Adjustment of valve and decompression mechanisms
Clutch adjustment
Adjusting the clutch of the starting motor gearbox
Adjusting the crankshaft speed of the starting engine
Chapter 13. Maintenance of main engine components
Caring for the crank mechanism
Caring for the timing mechanism and cylinder head
Chapter 14. Maintenance of power supply, lubrication and cooling system components
Maintenance of the fuel pump and regulator
Nozzle care
Fuel filter care
Air purifier care
Maintenance of the lubrication system
Cooling System Maintenance
Chapter 15. Maintenance of the starting device and electrical equipment
Caring for the starting motor and gearbox
Starter care
Generator care
Ignition system care
Carburetor care
Chapter 16. Maintenance of additional units
Clutch care
Hydraulic pump care
Chapter 17. Basic engine malfunctions and methods for eliminating them
Main engine malfunctions
Malfunctions of the starting motor and gearbox
Electrical faults
Clutch malfunctions
Section III. REPAIR OF ENGINE AND FUEL EQUIPMENT
Chapter 18. Engine repair in a collective farm or state farm workshop
Preparing the engine for repair
Engine washing
Partial engine disassembly
Disassembling the engine into components and parts
Washing engine parts
Repair of main parts and assemblies
Chapter 19. Repair of fuel equipment
Equipment, devices and devices for repairing fuel equipment
Disassembly and assembly of fuel equipment units
Defects of main parts and components of fuel equipment
Chapter 20. Repair of the starting device
Starting motor repair
Repair of the starting motor gearbox
Chapter 21. Assembly, running and testing of the engine
General engine assembly
Running in and testing the engine
Engine inspection
Applications
Literature
